Performing C++ SOURCE FILE Test HAVE_OMIT_LEAF_FRAME_POINTER failed with the following output:
Change Dir: /home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_95f51/fast"
make[1]: Entering directory '/home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_95f51.dir/build.make CMakeFiles/cmTC_95f51.dir/build
make[2]: Entering directory '/home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_95f51.dir/src.cxx.o
/home/br-user/autobuild/run/instance-0/output-1/host/bin/xtensa-linux-g++ --sysroot=/home/br-user/autobuild/run/instance-0/output-1/host/xtensa-buildroot-linux-uclibc/sysroot    -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -mlongcalls -mauto-litpools -Os -W -Wextra -Wall -Wsign-compare -Wshadow -Wno-unused-parameter -Wno-unused-variable -Woverloaded-virtual -Wnon-virtual-dtor -Wno-missing-field-initializers -Wno-strict-aliasing -std=c++11 -fno-omit-frame-pointer -DHAVE_OMIT_LEAF_FRAME_POINTER  -DNDEBUG   -momit-leaf-frame-pointer -o CMakeFiles/cmTC_95f51.dir/src.cxx.o -c /home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp/src.cxx
xtensa-linux-g++.br_real: error: unrecognized command line option '-momit-leaf-frame-pointer'; did you mean '-fomit-frame-pointer'?
CMakeFiles/cmTC_95f51.dir/build.make:65: recipe for target 'CMakeFiles/cmTC_95f51.dir/src.cxx.o' failed
make[2]: *** [CMakeFiles/cmTC_95f51.dir/src.cxx.o] Error 1
make[2]: Leaving directory '/home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_95f51/fast' failed
make[1]: *** [cmTC_95f51/fast] Error 2
make[1]: Leaving directory '/home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp'

Source file was:
int main() { return 0; }
Performing C++ SOURCE FILE Test HAVE_SSE42 failed with the following output:
Change Dir: /home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_b6aa9/fast"
make[1]: Entering directory '/home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_b6aa9.dir/build.make CMakeFiles/cmTC_b6aa9.dir/build
make[2]: Entering directory '/home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_b6aa9.dir/src.cxx.o
/home/br-user/autobuild/run/instance-0/output-1/host/bin/xtensa-linux-g++ --sysroot=/home/br-user/autobuild/run/instance-0/output-1/host/xtensa-buildroot-linux-uclibc/sysroot    -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -mlongcalls -mauto-litpools -Os -W -Wextra -Wall -Wsign-compare -Wshadow -Wno-unused-parameter -Wno-unused-variable -Woverloaded-virtual -Wnon-virtual-dtor -Wno-missing-field-initializers -Wno-strict-aliasing -std=c++11 -fno-omit-frame-pointer -DHAVE_SSE42 -msse4.2 -mpclmul  -DNDEBUG   -o CMakeFiles/cmTC_b6aa9.dir/src.cxx.o -c /home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp/src.cxx
xtensa-linux-g++.br_real: error: unrecognized command line option '-msse4.2'
xtensa-linux-g++.br_real: error: unrecognized command line option '-mpclmul'
CMakeFiles/cmTC_b6aa9.dir/build.make:65: recipe for target 'CMakeFiles/cmTC_b6aa9.dir/src.cxx.o' failed
make[2]: *** [CMakeFiles/cmTC_b6aa9.dir/src.cxx.o] Error 1
make[2]: Leaving directory '/home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_b6aa9/fast' failed
make[1]: *** [cmTC_b6aa9/fast] Error 2
make[1]: Leaving directory '/home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp'

Source file was:

#include <cstdint>
#include <nmmintrin.h>
#include <wmmintrin.h>
int main() {
  volatile uint32_t x = _mm_crc32_u32(0, 0);
  const auto a = _mm_set_epi64x(0, 0);
  const auto b = _mm_set_epi64x(0, 0);
  const auto c = _mm_clmulepi64_si128(a, b, 0x00);
  auto d = _mm_cvtsi128_si64(c);
}

Determining if the getauxval exist failed with the following output:
Change Dir: /home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_174ce/fast"
make[1]: Entering directory '/home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_174ce.dir/build.make CMakeFiles/cmTC_174ce.dir/build
make[2]: Entering directory '/home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_174ce.dir/CheckSymbolExists.cxx.o
/home/br-user/autobuild/run/instance-0/output-1/host/bin/xtensa-linux-g++ --sysroot=/home/br-user/autobuild/run/instance-0/output-1/host/xtensa-buildroot-linux-uclibc/sysroot    -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -mlongcalls -mauto-litpools -Os -W -Wextra -Wall -Wsign-compare -Wshadow -Wno-unused-parameter -Wno-unused-variable -Woverloaded-virtual -Wnon-virtual-dtor -Wno-missing-field-initializers -Wno-strict-aliasing -std=c++11 -fno-omit-frame-pointer -Werror -fno-builtin-memcmp   -DNDEBUG   -o CMakeFiles/cmTC_174ce.dir/CheckSymbolExists.cxx.o -c /home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx
/home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx:2:10: fatal error: auvx.h: No such file or directory
 #include <auvx.h>
          ^~~~~~~~
compilation terminated.
CMakeFiles/cmTC_174ce.dir/build.make:65: recipe for target 'CMakeFiles/cmTC_174ce.dir/CheckSymbolExists.cxx.o' failed
make[2]: *** [CMakeFiles/cmTC_174ce.dir/CheckSymbolExists.cxx.o] Error 1
make[2]: Leaving directory '/home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_174ce/fast' failed
make[1]: *** [cmTC_174ce/fast] Error 2
make[1]: Leaving directory '/home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp'

File /home/br-user/autobuild/run/instance-0/output-1/build/rocksdb-6.6.4/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx:
/* */
#include <auvx.h>

int main(int argc, char** argv)
{
  (void)argv;
#ifndef getauxval
  return ((int*)(&getauxval))[argc];
#else
  (void)argc;
  return 0;
#endif
}